Results 81 to 90 of about 25,642 (273)

Evaluating the influence of lake morphology, trophic status and diagenesis on geochemical profiles in lake sediments [PDF]

, 2010
Recent geochemical studies provide evidence that changes in vertical distributions of nutrients in lake sediments are driven by anthropogenic activities, based primarily on trends of increasing concentrations in upper sediment layers.
Hamilton, David P., Pilditch, Conrad A., Trolle, Dennis   +2 more
core   +2 more sources

An aminostratigraphy of the northern Upper Rhine Graben, Germany

Journal of Quaternary Science, Volume 40, Issue 7, Page 1147-1175, October 2025.
ABSTRACT The northern Upper Rhine Graben (Germany) contains a complex, quasi‐continuous Quaternary record, but constraining its chronology is challenging. This study presents the first application of amino acid geochronology for this region using Bithynia opercula to establish a relative dating framework.
Ellie Nelson, Dustin White, Lucy Wheeler, Joachim Wedel, Christian Hoselmann, Heiner Heggemann, Wolfgang Rähle, Kirsty Penkman   +7 more
wiley   +1 more source

Computer Code for Tephra Index

, 2023
The provided code incorporates a collection of linear regressions and stepwise selection techniques to predict tephra layers within lacustrine deposits using spectral gamma-ray data.
openaire   +1 more source

A tephrostratigraphic investigation of the continuously varved Holocene Boreal lake Nautajärvi, Finland, provides precise age estimate for Lairg A/Hekla 5 eruption

Journal of Quaternary Science, Volume 40, Issue 7, Page 1212-1229, October 2025.
ABSTRACT Numerous cryptotephra layers originating from Icelandic volcanoes and further afield have reached Northern Europe during the Holocene. Refining the precise timing and the relative frequency of local and distal eruptions requires well‐resolved continuous sediment archives. Lake Nautajärvi is located in central‐southern Finland (61°48′ N, 24°41′
Alice Carter‐Champion, Katy Flowers, Antti E.K. Ojala, Simon Blockley, Paul Lincoln, Shuang Zhang, Christina Manning, Celia Martin Puertas   +7 more
wiley   +1 more source

Tephra segregation profiles based on disdrometer observations and tephra dispersal modeling: Vulcanian eruptions of Sakurajima volcano, Japan

Earth, Planets and Space
The profile of tephra concentration along a volcanic plume (i.e., the tephra segregation profile) is an important source parameter for the simulation of tephra transport and deposition and thus for the tephra sedimentation load.
Kosei Takishita, Alexandros-Panagiotis Poulidis, Masato Iguchi   +2 more
doaj   +1 more source

Tephra fall impacts to buildings: the 2017–2018 Manaro Voui eruption, Vanuatu

Frontiers in Earth Science
Building damage from tephra falls can have a substantial impact on exposed communities around erupting volcanoes. There are limited empirical studies of tephra fall impacts on buildings, with none on tephra falls impacting traditional thatched timber ...
Susanna F. Jenkins, Ame McSporran, Thomas M. Wilson, Carol Stewart, Graham Leonard, Sandrine Cevuard, Esline Garaebiti   +6 more
doaj   +1 more source

Stop 2 Kainui silt loam and Naike clay, Gordonton Rd [PDF]

, 2008
At this stop are several remarkable features both stratigraphic and pedological, and a “two-storied” soil, the Kainui silt loam alongside (in just a few places) the Naike clay. Both soils are Ultisols. The sequence of tephra beds and buried soil horizons
Lowe, David J.
core   +1 more source

Ice Cores from the St. Elias Mountains, Yukon, Canada: Their Significance for Climate, Atmospheric Composition and Volcanism in the North Pacific Region [PDF]

, 2014
A major achievement in research supported by the Kluane Lake Research Station was the recovery, in 2001 –02, of a suite of cores from the icefields of the central St.
Bourgeois, Jocelyne, Demuth, Mike, Fisher, David, Froese, Duane, Goto-Azuma, Kumiko, Kreutz, K, Mayewski, Paul A, Osterberg, Erich, Steig, Eric J, Wake, Cameron P, Yalcin, Kaplan, Zdanowicz, Christian, Zheng, James   +12 more
core   +4 more sources

Imperial systems and local landscapes of Buldan Yayla in Western Anatolia (Türkiye) during the last 4000 years: An integrated palynological, historical, and archaeological approach

Journal of Quaternary Science, Volume 40, Issue 7, Page 1285-1304, October 2025.
ABSTRACT This study investigates long‐term impacts of empires on local socio‐ecosystems in western Anatolia (modern western Türkiye) over the past four millennia. We focus on Buldan Yayla Lake, located in a small mountain basin north of the Büyük Menderes (Great Meander) River valley.
Sabina Fiołna, Mustafa Doğan, Warren Eastwood, John Haldon, Georgios C. Liakopoulos, Dilek Şenkul, Çetin Şenkul, Adam Izdebski   +7 more
wiley   +1 more source

VOLCANIC EVENTS RECORD OVER THE LAST 900 YEARS FROM SNOW AND FIRN SEQUENCE IN VOSTOK STATION AREA

Лëд и снег, 2015
The results of chemical analyses of snow samples from five pits and cores drilled in the vicinities of Vostok Station, Antarctica, are presented. High resolution (every 2–3 cm, or about three samples per year) ion measurements allowed to compile a new ...
T. V. Hodzher, L. P. Golobokova, E. Yu. Osipov, N. A. Onishchuk, U. G. Filippova, V. Yu. Lipenkov, A. A. Ekaykin   +6 more
doaj   +1 more source